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ManufacturerBaader Planetarium
Weight (kg)0.062
Transmission Rangemultiple bands (see spectral image)
Filter Thickness (without cell)1 mm
AR-CoatingPhantom Coating® Group, Plane-optically polished
Filter UsageCCD, Color Correction, IR-Cut
Filter mountedMounted (LPFC 6mm)
Type of FilterBand-pass
Single or Set?Single Filter
Filter shaperound
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Baader Semi-APO Filter

Baader Semi-APO Filter

  • Two filters made into one for maximum brightness
  • Combines Fringe-Killer with Moon & Sky glow for Semi-APO contrast with refractors
  • Non-ageing sealed coating edges

Combination of "Neodymium Moon & Sky glow" and "Fringe Killer" Filters

Time and time again we were made aware of customers who were combining our Neodymium Moon and Sky glow filter with our Fringe Killers to deliver amazingly colour-corrected images to achromatic refractors. This combination however did produce reflections.

After analyzing these reports we developed our Baader Semi-APO filter with IR blocker, a reflection-free combination of the Moon & Sky glow with a stronger coating of the Fringe killer. This result was a virtually colour-neutral image without the blue and red halos (violet fringing) and an increase to image contrast. 

Specifications

Manufacturer Baader Planetarium
Weight (kg) 0.062
Transmission Range multiple bands (see spectral image)
Filter Thickness (without cell) 1 mm
AR-Coating Phantom Coating® Group, Plane-optically polished
Filter Usage CCD, Color Correction, IR-Cut
Filter mounted Mounted (LPFC 6mm)
Type of Filter Band-pass
Single or Set? Single Filter
Filter shape round
Select Size
From $24.34

Original: $69.54

-65%
Baader Semi-APO Filter—

$69.54

$24.34

Product Information

Shipping & Returns

Description

  • Two filters made into one for maximum brightness
  • Combines Fringe-Killer with Moon & Sky glow for Semi-APO contrast with refractors
  • Non-ageing sealed coating edges

Combination of "Neodymium Moon & Sky glow" and "Fringe Killer" Filters

Time and time again we were made aware of customers who were combining our Neodymium Moon and Sky glow filter with our Fringe Killers to deliver amazingly colour-corrected images to achromatic refractors. This combination however did produce reflections.

After analyzing these reports we developed our Baader Semi-APO filter with IR blocker, a reflection-free combination of the Moon & Sky glow with a stronger coating of the Fringe killer. This result was a virtually colour-neutral image without the blue and red halos (violet fringing) and an increase to image contrast. 

Specifications

Manufacturer Baader Planetarium
Weight (kg) 0.062
Transmission Range multiple bands (see spectral image)
Filter Thickness (without cell) 1 mm
AR-Coating Phantom Coating® Group, Plane-optically polished
Filter Usage CCD, Color Correction, IR-Cut
Filter mounted Mounted (LPFC 6mm)
Type of Filter Band-pass
Single or Set? Single Filter
Filter shape round